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公开(公告)号:WO1990001744A1
公开(公告)日:1990-02-22
申请号:PCT/US1989002875
申请日:1989-07-03
Applicant: HUGHES AIRCRAFT COMPANY
Inventor: HUGHES AIRCRAFT COMPANY , LO, Thomas, K. , SACKS, Jack, M. , SIMONI, Wayne, P. , LEE, Leonard, A. , NGUYEN, Harrison , KARLIN, Lynne, M. , QUAN, Andy, L. , HOSOKAWA, Kazuo, R.
IPC: G06F15/336
CPC classification number: G06T7/20 , G06F17/153 , H04N19/43 , H04N19/51
Abstract: A method and apparatus for correlating two signals representing a live image and a reference image are disclosed. The reference signal is processed to provide a polarity bit and mask bit for each pixel position in the reference image. The processed video signal is stored in a memory (20) and used in a convolver and summer section (18) in which the polarity bits between the reference and live images are gated by gate (17) and are used in generating a correlation output from summer (23). However, the polarity bits do not affect the correlation output if the logical output from gate (19) is of a given state which occurs if the associated mask bits indicate that the gradient value at the particular pixel position does not exceed certain minimum threshold values.
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公开(公告)号:EP0386181B1
公开(公告)日:1994-09-14
申请号:EP89907913.1
申请日:1989-07-03
Applicant: Hughes Aircraft Company
Inventor: LO, Thomas, K. , SACKS, Jack, M. , SIMONI, Wayne, P. , LEE, Leonard, A. , NGUYEN, Harrison , KARLIN, Lynne, M. , QUAN, Andy, L. , HOSOKAWA, Kazuo, R.
IPC: G06F15/336 , G06F15/70
CPC classification number: G06T7/20 , G06F17/153 , H04N19/43 , H04N19/51
Abstract: A method and apparatus for correlating two signals representing a live image and a reference image are disclosed. The reference signal is processed to provide a polarity bit and mask bit for each pixel position in the reference image. The processed video signal is stored in a memory (20) and used in a convolver and summer section (18) in which the polarity bits between the reference and live images are gated by gate (17) and are used in generating a correlation output from summer (23). However, the polarity bits do not affect the correlation output if the logical output from gate (19) is of a given state which occurs if the associated mask bits indicate that the gradient value at the particular pixel position does not exceed certain minimum threshold values.
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公开(公告)号:EP0386181A1
公开(公告)日:1990-09-12
申请号:EP89907913.0
申请日:1989-07-03
Applicant: HUGHES AIRCRAFT COMPANY
Inventor: LO, Thomas, K. , SACKS, Jack, M. , SIMONI, Wayne, P. , LEE, Leonard, A. , NGUYEN, Harrison , KARLIN, Lynne, M. , QUAN, Andy, L. , HOSOKAWA, Kazuo, R.
CPC classification number: G06T7/20 , G06F17/153 , H04N19/43 , H04N19/51
Abstract: On a mis au point un procédé et un appareil mettant en corrélation deux signaux représentant une image en direct et une image de référence. Le signal de référence est traité pour fournir un bit de polarité et un bit de masquage pour chaque position de pixel dans l'image de référence. Le signal vidéo traité est stocké dans une mémoire (20) et utilisé dans une partie (18) à circonvolutionneur et additionneur dans laquelle les bits de polarité entre les images de référence et les images de direct sont déclenchés par la porte (17), et sont utilisés pour produire une sortie de corrélation provenant de l'additionneur (23). Toutefois, les bits de polarité n'influent pas sur la sortie de corrélation si la sortie logique provenant de la porte (19) est dans un état donné se produisant si les bits de masquage associés indiquent que la valeur de gradient au niveau de la position particulière de pixel ne dépasse pas certaines valeurs de seuil minimum.
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